//part1:C07:ex7.11 -- test Sales_data.h
#include <iostream>
#include "Sales_data.h"

int main(void)
{
    using namespace std;
    Sales_data data1;
    Sales_data data2("978-121-15535-2");
    Sales_data data3("978-7-121-15535-2", 100, 128, 109);
    Sales_data data4(cin);

    cout << "book sales report :\n";
    cout << data1 << "\n" << data2 << "\n" << data3 << "\n" << data4
         << "\n";

    return 0;
}


